Plugin picker (F8) - Displays an array of plugins (effects
left, instruments right). To use the Plugin picker, click, hold and drag the icon associated with the plugin you want to use and the
picker list will close. Drop the plugin on the target location inside FL Studio. See the Browser section of the manual for details on customizing the Plugin picker.

Project picker (Ctrl+F8) - Displays an array of Clips & Channels
used in a project and the relationship between them, notice the yellow ticks, when the Mouse Cursor is placed over an item. The main purpose of the Project Picker is to select items by clicking on them for use
in the Playlist.

Layout

Align all channel editors (Shift + F12) - Arranges all Channel plugin windows to align to the top-left corner of the focussed plugin. NOTE: This will not work with 'Detached' plugins.

Arrange windows

Realign (Shift+Ctrl+H) - Restores the default-install layout.

Into workspace - Moves all windows into the visible FL Studio desktop workspace. Useful is windows have been moved outside the workspace. For example, when a second monitor was used and is now no-longer available).

Desktop (default) - Restores the default layout.

Alternate - Simply an alternate layout. Try it, you may like it :)

Tablet (default) - Touch friendly layout with important toolbar items arranged along the bottom of the window.

Tablet (alternate) - Alternative version of the Tablet layout.

Custom - Restores the custom layout. Use the Save current arrangement option below to create one.

Background - Allows you to choose wallpaper for FL Studio main window.

Set bitmap wallpaper - Allows you to use an image for the main window background.

Set dynamic wallpaper / HTML document - Lets you choose a dynamic wallpaper or HTML document for the main window background. Dynamic wallpapers are in the format .txt can be edited using a standard text editor. They display FL Studio version information, blur when FL Studio is not focussed and adjust to suit the scaling settings.